Optimal Foraging Theory
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Ecologia alimentar da toninha Pontoporia blainvillei (Cetacea) / Feeding ecology of franciscana dolphin Pontoporia blainvillei (Cetacea)
Ecological niche theory is originally based on the assumption that individuals of a species use similar resources and therefore are ecologically equivalents. Under this framework, the niche of the species can be defined in terms of average resource use. However, factors such as quality and quantity of prey resources in the environment, consumer gender, age o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2011
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2. Pesca, etnoictiologia e biologia de peixes no sul do Brasil
A ecologia humana analisa as relações entre populações humanas e os recursos naturais e pode gerar informações úteis para o manejo das atividades de pesca em áreas costeiras. Este estudo foi realizado nos anos de 2007 e 2008 em duas comunidades de pescadores do litoral sul do Brasil, localizadas nas praias da Guarda do Embaú (GE) e Pinheira (PP), no
Publicado em: 2011
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3. Analise das estrategias da pesca do camarão de São Francisco, São Sebastião-SP : pela Teoria do Forrageio Otimo / Analysis of the strategies of shrimp fishing in São Francisco, São Sebastião-SP : through the Optimal Foraging Theory
This study uses ecological models derived from the Optimal Foraging Theory (OFT) to understand the decision-making processes among bottom trawling shrimp fishermen at the São Francisco Neighborhood, in the district of São Sebastião, SP, Brazil. Using the theoretical background of Human Behavioral Ecology the aim of this work was to analyze fishermen s str
Publicado em: 2009
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4. Análise do comportamento dinâmico da pesca profunda de emalhe no Brasil através da aplicação da tecnologia de monitoramento de embarcações via satélite e de modelos de forrageio ótimo
Recentemente um número crescente de estudos científicos abordando vários aspectos das pescarias comerciais tem sido desenvolvido com o uso do sistema de rastreamento via satélite (Vessel Monitoring System VMS). Entre eles podese incluir o estudo do comportamento das frotas e das estratégias espaçotemporais escolhidas para a exploração de recursos-alv
Publicado em: 2008
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5. Aspectos ecológicos e sociais da coleta informal de resíduos sólidos urbanos do município de São Carlos - SP.
This work was developed along with informal waste collectors of recyclable solid waste in the urban area of the city of São Carlos SP. An effort has been performed with the aim of combining ecological studies with the garbage problematic and social exclusion the informal waste collection brings. The adequacy of concepts of the ecological theory (ecological
Publicado em: 2005
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6. Ecologia de tres comunidades de pescadores do Rio Piracicaba (SP)
The Piracicaba River s Basin is located in an urbanized and industrialized region. The downstream portion of the Piracicaba River was impounded and the reservoir sustained some riverine fishing communities along it s margins. This study analyses the fisheries in three Piracicaba river bank communities. Rua do Porto. Ponte de Santa Maria da Serra and Tanquã.
Publicado em: 1997
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7. Uso de habitat pelo bugio, Alouatta fusca Clamitans, em um fragmento florestal em Lençois Paulista-SP
The habitat use of a group of three brown howler monkeys (Alouatta fusca clamitans) was studied in a fragment with 165 ha of semideciduous forest in Lençóis Paulista, west of São Paulo State. Aspects of diet, time budgets and space use of the animals were investigated during 12 months. It was carried out also the fIoristic study of the area and the phenol
Publicado em: 1997
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8. Dimensionless invariants from foraging theory's marginal value theorem.
Copula duration (t) decreases, and proportional rate of sperm transfer (c) increases, with larger male body size in dung flies, so their dimensionless product (c. t) is approximately constant (approximately 2.2). The most recent copulating male fertilizes about 89% of the eggs laid (= 1 - e(-c.t) = 1 - e(-2.2)), independent of his body size. The conditions u
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9. Visual constraints in foraging bumblebees: Flower size and color affect search time and flight behavior
In optimal foraging theory, search time is a key variable defining the value of a prey type. But the sensory-perceptual processes that constrain the search for food have rarely been considered. Here we evaluate the flight behavior of bumblebees (Bombus terrestris) searching for artificial flowers of various sizes and colors. When flowers were large, sea
The National Academy of Sciences.
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10. Niche packing and coevolution in competition communities
A coevolutionary model of species packing is developed that allows evolutionary adjustment in both niche position and within-phenotype niche width of one-three competing species. The environment is specified as a single resource dimension x and availability of resources along x is given by a gaussian curve that has parameters x[unk]R and σR. The model predi
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11. Separating the effects of predation risk and interrupted foraging upon mass changes in the blue tit Parus caeruleus.
The optimal amount of reserves that a small bird should carry depends upon a number of factors, including the availability of food and environmental predation risk levels. Theory predicts that, if predation risk increases, then a bird should maintain a lower level of reserves. Previous experiments have given mixed results: some have shown reduced reserves an
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12. Seasonal Population Dynamics and Interactions of Competing Bacteriophages and Their Host in the Rhizosphere
We describe two prolonged bacteriophage blooms within sugar beet rhizospheres ensuing from an artificial increase in numbers of an indigenous soil bacterium. Further, we provide evidence of in situ competition between these phages. This is the first in situ demonstration of such microbial interactions in soil. To achieve this, sugar beet seeds were inoculate
American Society for Microbiology.